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Publication numberUS4600314 A
Publication typeGrant
Application numberUS 06/665,179
Publication dateJul 15, 1986
Filing dateOct 26, 1984
Priority dateOct 26, 1984
Fee statusLapsed
Publication number06665179, 665179, US 4600314 A, US 4600314A, US-A-4600314, US4600314 A, US4600314A
InventorsGeorge E. Theriault
Original AssigneeTheriault George E
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Smoke detector cutoff timer
US 4600314 A
A mountable remote cutoff timer for a smoke detector that is powered by a battery and includes a timer that is operatively connected to the battery, a light emitting device for indicating improper connection of the battery, and VELCROŽ for attaching the mountable cutoff timer to the wall.
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What is claimed is:
1. A smoke detector system having a smoke detector and a mountable remote cutoff timer for said smoke detector, that controls power from a battery, said timer comprising:
a unit separate and remotely disposed from, but with electrical connected means to, the smoke detector;
a timer contained within said unit;
battery coupling means within said unit for receiving the battery which can remotely energize the smoke detector, said timer capable of disengaging the battery from energization of the smoker detector for a selected period of time; and
indicator means on said unit for indicating improper connection of the battery to the unit.
2. The remote timer as defined in claim 1, wherein said indicator means includes a polarity sensitive light emitting device mounted to said unit.
3. The remote timer as defined in claim 1; further comprising means for mounting the remote timer to a wall.
4. The remote timer as defined in claim 3, wherein said means includes VELCROŽ.

The present invention relates to smoke detector devices. More particularly, it relates to smoke detector devices that are powered by an internally mounted battery.

Smoke detector devices of the above-mentioned general type are known in the art. Smoke detectors are relatively small devices that mount on the ceiling and are triggered off by the ionization of the air caused by the presence of smoke. Thus, the smoke detector has proved to be a valuable warning against fire.

However, since the smoke detector is triggered off by smoke and not by the fire proper, a lot of other smoke creating situations, that are not caused by fire, can trigger off the detector. For instance, an abundance of cigarette smoke, some burnt cooking, etc. Thus, false indicators of fire will trigger off the smoke detector erroneously and cause an audible sound and possible panic.


Accordingly, it is the primary object of the present invention to provide a smoke detector cutoff timer that avoids the disadvantages of the prior art.

Another object of the present invention is to provide a smoke detector cutoff timer that is mounted by VELCROŽ in a position remote from the smoke detector and that which is within easy reach.

Yet another object of the present invention is to provide a smoke detector cutoff timer that contains the battery to power the smoke detector so as to allow for simple replacement of burnt out batteries.

Still another object of the present invention is to provide a smoke detector cutoff timer that can inactivate the smoke detector for a predetermined period of time.

Yet still another object of the present invention is to provide a smoke detector cutoff timer that has a light emitting diode that lights if the replacement battery is inserted incorrectly with respect to polarity.

Further objects of the invention will appear as the description proceeds.

To the accomplishment of the above and related objects, this invention may be embodied in the form illustrated in the accompanying drawings, attention being called to the fact, however, that the drawings are illustrative only and that changes may be made in the specific construction illustrated and described within the scope of the appended claims.


The figures in the drawings are briefly described as follows:

FIG. 1 is a perspective view illustrating the invention in use.

FIG. 2 is an enlarged partially exploded perspective view.

FIG. 3 is an electrical schematic diagram of the invention.


Referring now to FIG. 1, the smoke detector cutoff timer is shown generally at 10, mounted to a wall 12, and connected to a smoke detector 14 mounted on a ceiling 16. The smoke detector cutoff timer 10 is electrically connected to the smoke detector 14 by a cable 18.

As shown in FIG. 2, the smoke detector cutoff timer 10 is mounted to the wall 12 by the use of VELCROŽ 20. The smoke detector cutoff timer 10 is substantially box shaped and has a front face 22 that contains a recess 24 that is provided with a battery connector 26 at its rear face 28. The recess 24 is formed to receive a battery 30 which powers the smoke detector 14. The smoke detector cutoff timer 10 further has a top face 32 that has a connector 34 mounted to it. The cable 18 connects to the connector 34.

Additionally, disposed on the front face 22 is a timer knob 36 with a pointer 38 that is movable through a plurality of markings 40 also disposed on the front face 22. Thus, the timer knob can be set in a number of different positions so as to vary the predetermined delay time.

Additionally, disposed on the top face 22 is an optional light emitting diode 42 or any other light emitting device with the word "WRONG" inscribed above it. If the battery 30 is inserted incorrectly into the recess 24, that is, the connectors of the battery 30 do not mate with the connector 26, the light emitting diode 42 will light and indicate a wrong connection. This will advise the user to remove the battery 30, reverse its connector position, and reinsert it correctly so that the respective connectors mate.

The schematic for the circuitry of the smoke detector cutoff timer 10 is shown in FIG. 3. The smoke detector 14 is connected to the smoke detector cutoff timer 10 by the cable 18 and the connectors 34. Internally mounted to the smoke detector cutoff timer 10 is a mechanical timer 44 which mechanically opens and closes the circuit between the battery 30 and the smoke detector 14. This allows the smoke detector 14 to be deactivated from a remote position for a predetermined length of time. Connected in parallel to the battery 30 is the light emitting diode 42 with a dropping resistor 46 as is well known in the art. This allows for the correct polarity connection of the battery 30 since its connectors, connect with connectors 26 which are recessed and not readily visible.

It is to be specifically understood that although a mechanical timer 44 is thus far illustrated in this specification that there are numerous electro-mechanical, and completely electronic timers which could be used with equally sufficient results, and these timer could even be powered by the same battery 30, which powers the smoke detector 14.

While certain novel features of this invention have been shown and described and are pointed out in the annexed claims, it will be understood that various omissions, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing from the spirit of the invention.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3979664 *Mar 3, 1975Sep 7, 1976Brunswick CorporationCapacitor discharge ignition testing apparatus employing visual spark gap indicator
US4313110 *Feb 19, 1980Jan 26, 1982Thomas SubulakSmoke alarm having temporary disabling features
US4383251 *Oct 1, 1981May 10, 1983Perelli David ETimed smoke detection
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4679037 *Dec 16, 1985Jul 7, 1987Horace BryanAttachment for smoke alarms
US4788530 *Oct 13, 1987Nov 29, 1988Maurice BernierRemote switching device for smoke detector
US4792797 *Mar 5, 1987Dec 20, 1988Seatt CorporationSmoke detector having variable level sensitivity
US4916438 *May 4, 1989Apr 10, 1990Oneac CorporationBattery charging, monitoring and alarm circuit
US4937556 *Oct 4, 1988Jun 26, 1990Scott Avery DWindow guard monitoring system and guard
US4987409 *Apr 24, 1989Jan 22, 1991Jackson Ronald ELevel sensor and alarm
US5093651 *Oct 11, 1990Mar 3, 1992Thomas Edward MIntelligent smoke detector
US5132669 *Sep 18, 1990Jul 21, 1992Jackson Ronald ELevel sensor with alarm
US5186653 *Jan 6, 1992Feb 16, 1993Robert Normand ASmoke alarm remote disconnect
US5300923 *Mar 23, 1992Apr 5, 1994Gruber Ralph WApparatus and method for disabling a smoke detector when using a smoke-emanating apparatus
US5410299 *Nov 5, 1992Apr 25, 1995Hard; Mindy J.Smoke detector
US5646598 *May 2, 1995Jul 8, 1997Nickles; Aaron MichaelSmoke detector with advanced safety features
US6172612Jun 4, 1999Jan 9, 2001Mark OdachowskiSmoke detector with remote testing, shutoff and powering means
US6492907Sep 1, 2000Dec 10, 2002Mccracken Robert E.Detector system
US6975223 *Aug 15, 2003Dec 13, 2005Petar MladenPremises protection safety system
US7098782Jul 31, 2003Aug 29, 2006Peckham David PMethod and apparatus for temporary muting of smoke alarms
USRE33920 *Jul 11, 1989May 12, 1992Seatt CorporationSmoke detector having variable level sensitivity
DE3722608A1 *Jul 9, 1987Feb 2, 1989Gyulai Maria DobosneDevice and method for determining and indicating the concentration of cigarette, cigar, pipe and car-exhaust smoke
U.S. Classification368/10, 340/527, 250/381, 250/574, 340/628, 356/438
International ClassificationG08B17/10
Cooperative ClassificationG08B17/10
European ClassificationG08B17/10
Legal Events
Sep 27, 1994FPExpired due to failure to pay maintenance fee
Effective date: 19940720
Jul 17, 1994LAPSLapse for failure to pay maintenance fees
Feb 22, 1994REMIMaintenance fee reminder mailed
Jan 12, 1990FPAYFee payment
Year of fee payment: 4